Adolph klein



A. KLEIN.

METHOD OF MAKING A LEAD COATED COPPER SHEETINGL APPLICATION FILEDAUG.24. 1921.

1,437,316. Patented Nov. 28,1922.

WITNESSES INVENTOI? A TTORA/EVS v Patented Nov. 28, 1922.

PATENT OFFICE.

ADOLPH KLEIN, OF NEW YORK, II. Y.

METHOD OF MAKING A LEAD-COATED COPPER SHEETING'.

Application filed August 24, 1921.

To all whom it may concern:

Be it known that I, AooLrn KLEIN, a citizen of the United States and aresident of the city of New York, borough of Bronx,

in the county of Bronx and State of New York, have invented a new andImproved Method of Making a Lead-Coated Copper Sheeting, of which thefollowing is a full, clear, and exact description.

This invention relates to coated metallic sheeting, and has particularreference to a leadcoated copper sheeting and method of making the same.

An object of the invention is to provide a lead-coated copper sheetingand method of making the same whereby all the beauty of lead for use onbuildings, in the shape of gutters, leaders, etc., may be retained andat the same time retaining all the good qualities of copper where usedfor the aforementioned purposes.

Another object resides in the provision of a method whereby this articleof manufacture may be described and economically pro- 25 duced with aminimum of expenditure of time and labor.

A further object resides in the particular procedure whereby alead-coated copper ar ticle of manufacture is produced having anartistic, antique and weathered appearance which adds beauty to anystructure with which it is used.

The sheeting is s..-own in the drawings, of .which Figure 1 is a planview of a sheet partly brolzen away to show the base metal; and

Figure 2 is a section.

In the performance of my method, I take asneet of copper, such as 1., ofany suitable quality ant dimensions, and, preferably, run it through amangle machine, the roller surface of which is not smooth but veryuneven. By this step I mangle or makeuneven the surface of the coppersheet. This unevenness may also be produced by hammering or beating, togive the sheet the uneven, artistic, antique appearance usually found inbeaten copper.

After being mangled the sheet is washed with a solution of anysuitablechemical for the purpose of removing any dirt, grease,

Serial No. 494,845.

oil or other impurities, which solution, preferably, is zinc chloride.After thus being washed, the sheet is run in any suitable manner througha bath of molten lead. The 5 immersion in the lead take place as manytimes as desired and for as long a period of time as is necessary toproduce the proper coatings, such 2 3. After the sheet has cooled, it iswashed with any suitable oxidizing agent, which may be, and ispreferably, a solution of sulphuric acid, or of sulphate of iron orzinc, or a solution. of sodium or potassium chloride, which agentsaccelerate the action of nature and oxidize the lead surface.

By the performance of the above-mentioned steps, l produce in a simpleand economical manner a coated sheeting for any desired use, which hasan antique, artistic appearance, usually resident in lead material, andwhich at the same time, retains all the advantageous properties andqualities of copper.

ll hat I claim is:

l. The method of producing lead-coated copper sheetin which comprisesmangling t" 7 the copper to produce an uneven, irregular surfacethereon, treating the copper surface with a cleansing a o'ent. passingthe copper surface through a lead bath, and then treat ins; the leadsurface with an oridixing agent after it has cooled.

2. Themethod of producing lead-coated copper sheeting, which comprisesmangling the copper to produce an llIlcVQll, irregular surface, cleaningthe copper with a solution of zinc chloride, runnin the copper through abath of molten lead, and then oxidizing the lead surface with sulphatesof iron and zinc and sodium or potassium chloride.

3. The method of producing antique leadcoated copper sheeting, whichcomprises mangling the copper to produce an irregular, uneven surface,cleaning the copper surface with zinc chloride, running the copperthrough a bath of molten lead, and then treating the lead, aftercooling, with an oxidizing agent to produce a weathered appearance.

ADOLPH KLEIN.

